From N2OO:

I just got this info from Steve KU9C about what to tell your postal clerk if you are wanting to exchange any IRC’s before they expire.

OK.....for anyone wanting to brave the USPS IRC redemption process, I spoke to the person that graciously helped me out a few days ago.  Here is how their system works.
IF!!! THEY ARE USING THE RSS SYSTEM
Press Sales Disbursement
Then press MORE
Then, EXCHANGES
At the bottom, press FOREIGN IRCs

Good luck all!!
73Steve KU9C

73
Bob Schenck, N2OO